Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INCOME:
Interest income	$ 43,325	$ 44,272	$ 47,023
Wealth management fees	4,362	3,970	3,751
Other income	10,424	20,569	25,703
Total operating income	58,111	68,811	76,477
Expenses:
Interest expense	5,243	6,567	8,824
Salaries and employee benefits	22,601	30,627	30,417
Provision for loan losses	1,960	109	3,438
Other expense	18,480	23,414	23,842
Total operating expenses	48,284	60,717	66,521
Income before income taxes	9,827	8,094	9,956
Income tax expense	2,341	1,931	1,966
NET INCOME	7,486	6,163	7,990
Non-controlling interest in consolidated subsidiary	98	(9)	(1,504)
Net income attributable to Middleburg Financial Corporation	7,584	6,154	6,486
Total assets	1,222,857	1,227,753	1,236,781
Capital expenditures	920	928	1,045
Goodwill and other intangibles	3,807	5,346	6,017
Commercial & Retail Banking [Member]
INCOME:
Interest income	43,149	43,702	46,095
Wealth management fees	0	0	0
Other income	5,349	4,527	4,413
Total operating income	48,498	48,229	50,508
Expenses:
Interest expense	5,227	6,444	8,433
Salaries and employee benefits	16,567	16,464	15,678
Provision for loan losses	1,926	105	3,410
Other expense	15,818	17,916	17,413
Total operating expenses	39,538	40,929	44,934
Income before income taxes	8,960	7,300	5,574
Income tax expense	1,894	1,608	1,593
NET INCOME	7,066	5,692	3,981
Non-controlling interest in consolidated subsidiary	0	0	0
Net income attributable to Middleburg Financial Corporation	7,066	5,692	3,981
Total assets	1,338,604	1,222,837	1,216,813
Capital expenditures	911	895	947
Goodwill and other intangibles	0	0	0
Wealth Management [Member]
INCOME:
Interest income	14	14	10
Wealth management fees	4,516	4,139	3,891
Other income	0	0	0
Total operating income	4,530	4,153	3,901
Expenses:
Interest expense	0	0	0
Salaries and employee benefits	2,262	2,187	2,208
Provision for loan losses	0	0	0
Other expense	1,140	1,195	1,300
Total operating expenses	3,402	3,382	3,508
Income before income taxes	1,128	771	393
Income tax expense	447	323	373
NET INCOME	681	448	20
Non-controlling interest in consolidated subsidiary	0	0	0
Net income attributable to Middleburg Financial Corporation	681	448	20
Total assets	12,953	5,909	6,416
Capital expenditures	6	0	0
Goodwill and other intangibles	3,807	3,979	4,150
Mortgage Banking [Member]
INCOME:
Interest income	450	1,773	2,740
Wealth management fees	0	0	0
Other income	5,121	16,473	21,787
Total operating income	5,571	18,246	24,527
Expenses:
Interest expense	304	1,340	2,213
Salaries and employee benefits	3,772	11,976	12,531
Provision for loan losses	34	4	28
Other expense	1,722	4,903	5,766
Total operating expenses	5,832	18,223	20,538
Income before income taxes	(261)	23	3,989
Income tax expense	0	0	0
NET INCOME	(261)	23	3,989
Non-controlling interest in consolidated subsidiary	98	(9)	(1,504)
Net income attributable to Middleburg Financial Corporation	(163)	14	2,485
Total assets	0	41,745	94,282
Capital expenditures	3	33	98
Goodwill and other intangibles	0	1,367	1,867
Intercompany Eliminations [Member]
INCOME:
Interest income	(288)	(1,217)	(1,822)
Wealth management fees	(154)	(169)	(140)
Other income	(46)	(431)	(497)
Total operating income	(488)	(1,817)	(2,459)
Expenses:
Interest expense	(288)	(1,217)	(1,822)
Salaries and employee benefits	0	0	0
Provision for loan losses	0	0	0
Other expense	(200)	(600)	(637)
Total operating expenses	(488)	(1,817)	(2,459)
Income before income taxes	0	0	0
Income tax expense	0	0	0
NET INCOME	0	0	0
Non-controlling interest in consolidated subsidiary	0	0	0
Net income attributable to Middleburg Financial Corporation	0	0	0
Total assets	(128,700)	(42,738)	(80,730)
Capital expenditures	0	0	0
Goodwill and other intangibles	$ 0	$ 0	$ 0